Dependency Inversion Principle (DIP) vs Dependency Injection (DI)?

DIP is a software design principle (the 'D' in SOLID). DI is a specific pattern used to implement that principle.

DIP states that high-level modules should not depend on low-level modules; both should depend on abstractions (interfaces). DI is the technique of passing those abstractions into the object (usually via constructor) rather than the object creating the dependency itself.